China gate valve suppliers introduces you to several types of failures of pneumatic ball valves. The failure of the valve body is generally caused by these 6 factors. This article mainly discusses the common faults of the valve body from the valve seat, the ball core, the medium itself, the impurities stuck, the packing wear and the external vibration fastener loosening.
â‘  The seat of the aerodynamic ball valve will break or be damaged due to external force and corrosion during use, causing leakage of the ball valve. At this time, the valve body should be removed and the ball valve should be disassembled and replaced with a new seat;
â‘¡When small particles are mixed into the material, the ball valve will cause scratches on the surface of the valve core for a long time, and the valve core will wear and cause the ball valve to close tightly, causing leakage in the valve. If the manufacturer of the pneumatic ball valve coats the surface of the valve core with a smooth layer of PTFE material or evenly coats the acid-proof and alkali-proof coatings, the corrosion resistance of the valve core can be well enhanced to ensure the stability of the ball valve. At the same time, the PTFE coating has a good sealing function, so that the overall sealing of the ball valve is significantly improved;
â‘¢ The crystallization point of some materials is relatively low, especially in early autumn and early spring, if the heat preservation or heat tracing is not good, the materials will easily crystallize, causing the internal crystallization of the valve body, causing the valve body to stagnate. Generally, steam is used to purge the valve body to melt the crystals. However, when the crystal inside the valve body is serious, you need to disassemble the ball valve and enter the valve to remove the crystals. If the valve body is stuck due to the crystallization of the medium due to temperature or environmental factors, a jacket and necessary heat tracing can be added outside the valve body to keep the temperature around the valve core in a state where the medium can flow;
â‘£Sometimes the material will be mixed with some process impurities such as filaments or magnetic substances, and it is easy to accumulate at the valve core, causing the pneumatic ball valve to behave abnormally or even stagnate. At this time, the ball valve needs to be disassembled and impurities manually removed manually. In order to prevent the coarse body particles or filaments mixed in the pipeline from causing the valve body to be stuck, you can install a suitable filter in the front of the valve and clean it regularly, which can effectively reduce the valve body due to the mixing of impurities;
⑤ Leakage at the gland. First, because the connection between the pneumatic ball valve and the pipeline is a rigid connection, long-term vibration will loosen the gland and cause leakage. At this time, it is only necessary to tighten the gland, but it should not be too tight, so as not to affect the rotation of the rotating shaft; the second is that the sealing packing under the gland appears to be pressed, and the packing should be added in time;
â‘¥ The pneumatic ball valve has been in a state of vibration for a long time, loosening the fixing bolts of the middle bracket, causing the valve body to open and close in place, causing the connection parts to malfunction, and the bracket needs to be strengthened during maintenance; in addition, the spline of the connecting sleeve shaft between the cylinder and the valve body is seriously worn At this time, the sleeve shaft cannot effectively act on the valve body, and it may cause the ball valve to not open and close properly. In this case, the pneumatic ball valve manufacturer needs to replace the corresponding type of sleeve shaft.
Pneumatic ball valves in the actual use process due to abnormal working conditions, abnormal temperature / pressure ratio and excessive corrosion data and other factors, will cause the failure of the ball valve to malfunction; usually use the elimination method to determine the failure of the pneumatic ball valve Follow the principle of first checking the gas path, then checking the wiring, then checking the actuator and accessories, and finally checking the valve body, and after determining the fault location, the corresponding treatment method can be adopted.

Aerodynamic Ball Valve